Molding apparatus.



M. `LHEWLETT. MOLDING APPARATUS. APPLIGATION FILED JULY 1B, 1911 atented Apr, 2,. 1912 a 3 SHEETS-SHEET 1. l j i?? Iliff/A M. J. HEWLETT. l 4 MQLDING APPARATUS. KPPLIUATII FILED JULY's,1911. L A 1,022,240. 'Patented Apr. 2; 1912 rfi.. h

M. J. HEWLETT. MOLDING APPARATUS. PPLIGATION FILED JULY 18, 1911.

1,022,240. Patented Apr. 2, 191.2.'

a SHEETS-SHEET a'.

,STA-.TES f minima :'r.' HEWLETT, or Knwimnnviimnois.

Tann-whom it may concern: f l Beit known that I, Mannini J.'Hnwmri'r, --a citizenofr` the United States, residing at Keivanee, inthe county of Henry and State vof Illinois, have invented a new and useful Moliingxpparatns,of which the" following is4 a specicatio'ii. The invention relatos to improvements in apparatus for the molding of sand or analogous material, either for the formation of ;coife's'orin 'the making `of molds in which the .expansive foreegof compressed .air is employed to carry 'the sand toand pack it in the mold or molds.

Heretofo're when the relatively large sand :holdingor `compression chamber or recep' taclelias been employed for'molding a lar e`v number4 of cores. or vfor .making a, relative y large mold, it .has been found that the com- .20 pressed air will cut grooves or passages' sand Aholding o'r com ression chamber o'r receptacle, .and that a er these grooves or passages .areformed 'the air will travel through them to' the core box or ask and failto carry the sand .with it. As al result of this, most of the air will escape and the- V ing loi" compression chamber or receptacle 40 with the Aco'rebox or flask, whereby the eomCpressed airwill positively -ca'rry the sait; from 'af relatively large compression chamber or receptacle and to a core box or flask and firmly pack the' sand therein.

A further object o the invention is to ,provide 'a moldingappai'atus equipped with a subdivided sand iolding or compression chamber or receptacle having a plurality of separate pockets oicompartments, adapted -570 to he eqeiall v supplied with fluid pressure,

-. and= capable of causii'ig the same to carry..

the sand 'from the compression chamber or' receptacle to the core bos 'or llaskto be discharged.

WiL-li these and other objects in view, the invention consisCS in the'nstructio and tua y .1 MoLDINGIAPrARA'rs. f

Fig. 6 is a reverse plan .view

l a flask.

specification; Lettersrte'n't. PatetedAp-g1912g aiipncation med July is, 191i. serial N6. eaiss.

l nbvel combination of parts-hereinafter 5, described, illustratedinthe accompanying-'.

drawings,.and pointed out in the claims hereto ap ended; `it. being understood 'that 60 various c anges in' the form, proportion,

size and .'-uinor details of construction, within the scope of the claims, may -be resorted l i to without departinvfrom the-spiriti-or sacrificing any. of' t e advantages of the 651 inventio j In the drawings Figure lis a vertical- 'sectional view of a portionofa.rnoldingj i apparatus provided with a sand holdingor. 5

compression chamber or receptacle,-A conf 4structed in'accordance with this .mventio n...,.-

Fig. E?. is an enlargedvertical sectional "-..'I

throughthe sand holding oncompressin chamber or receptacle; "F1g. 3 is a vertical sectional view,.on the line of Figa-.2.4 A715 Fig.I 4 isa-plan view of the'sub-dividod'.

`sand holding 'compression ehambeor receptncle. Fig. 5 is-a'revers plan' view ioiw the same, the bottomplatebe removed.-"

udg. the com-:.80 pressed' air cap.- Fig. 7 lis a. -vertiealsecfrf tional view dof the lower portion of the sub1 .divided sand holding or compression. cham ber or rece tacle, showing the saine equipped l with a per orated bottom plate for eliar'ging Like numerals of reference'desighnatecoi'e Vrespoiidingparts -in allthe -guressof the drawings.'

.In the accompanying drawings in 90 is illustrated the preferred forni of the ins i vention, 1l designates a'. Asubdivided-',sand

holding receptacle, constitutin a.:complies-'gfA -sion chamber and. provided wit 4a. plurality compression chamber or'receptacle is circu-l lar 11n cross section at the upperend y3.a'n'd 100 -is rectangular at the lower-end 4.1 The?" ockets or compartments gradually increase" in area from the top to the bottom, aii`d the.' j..-

walls at the circular upper portionslmer e'"' into the rectangular lower portion. T e 1 increasing area ofthe pockets or cmpaitf-v ments-from top to bottom prevents the sand f om adhering to the side walls Vand causes'- t e sand tofeed downward regularly and i prevents the formation of air Vholes or :pas-4 sages. 'lhe sand holding or compression receptacle is oblongin .plan view, as clearly.4

"f 111,9,` apparatus;

' the lugs 12 are of sutlieientfsize to'perinit' 'ei-ire rings 23 ot' riililier'or other vielilahle illustrated :in Figs. 4' an 1"5 of the drawingsl lint it nay be Square', or'ziiijf other preferred' vewardindependently of the tahle hy the:

per and lower plates 15 and 16,- tuhe upper ginal portion or flange 17, which spaces the body portion of the upper plate 15 from the eate'lwitli the pockets or eonipartinent's of ,pressed -ai'r eapiis engaged with the same, as

'lar openings 32 ofthe said lower plate. 16.

Veirenlainpp'er ends olithe poiliets oi' comconfiguration and ip ay he. of any desired' 'sizel thev construe-tion being particularly .iinfsdei'itserllitha larger Size-S efzweld The .slib-divided sand holding receptacle l is, suspended from lli'e tahle 5 hy means of yertiea-1-jholts 6,liai'ing threaded upper and l'oiyerends 7;.and S, The table 5, which is reepioc'atahle laterallyi'to earry the sandholding reeeptaele to and frein a. suitable Somme: of sand supply, provided with an hpening in to which the upper end of the gende-holding receptacle 1 extends, theiip' per edges of the sand holding receptaelev being normally -in flush relation withthe iipf per face ofthe table. llie upper threadedl ends 7 of the: vertical holt-s G engage threaded openings in the tahle 5 and are rigidly Secured therein by means of jiminuts 10`. The lower portions of the bolts 6 extend through perforations 11 of horizontal pro-. jectingliigs 12, and receive' supporting.n'iitsgY l11d-upon which the lugs'll rest. 'lhe lugssand lioldiirr receptacle l, and the support-f receptacle ,'1- properly with .relatioir to tlif'r` ftable.4 The openings oi'. peioratioiis l1 of the sand holding rereptzurle to he moved iip 'ineans hereinafter described to engage the iipper end of the said reeeptaele' willi'a coin# pressedair cap 1-4..to make an air tight," Join-' or connection prior to .siiniill'aneniisilyl introducing eoiiipressed air into the po'eke'ts or compartments of' t-he sand receptacle 1;;

'The compressed air eap 14 eouiprsesiipplate. being provided with a. vdepressed inarlower plate lil to provide an interior eliainher 11S. -'l`l ie marginal flange 17 is secured by boltsY I9 tothe nnirginal portion of the lowerplate lil, which `is -eqnipped with a. plurality' of projeelingplugs 20, liavingainV passages'oii openings 2l, which eoniinuni-4 the sand holding; receptacle when the comelem-ly illustrated iii Figs. 2 and 3 of the draivingrs'.l The plugs 20, which project from the, liottoiv face of the lower are round and are suitably sei-.ured in viren'- The plugs inay he secured wit-hin the opeii-A ings ol' the lower plate 16 in any suitable iiiaiiii'er` and their projeeting portions re` or olas-tir nialeiiafl. which i'i-gisi'ers with the pai-(ments o'lf the subdivided sand holding 'reptiicle 1f and rseal the same while thje com- `prss`ed aris"being introduced int-o the said p oekets*v o r compartinents.- The. sealing rl'ngs'arejtapered orheveled at their outer f aretaining plate 2 4, securedto the hot- 4toi-n face of .the-lower `plate 1G by holt's 19" cap is secured by h'olts or screws 2`6to,fa

lower attaching {lange} 27 of a. s'teni or stand'- 'ard 28, which is provided vwith a passagelt),

eoniiniiniea'iting with the chamber 18 of-'the-" eoinpressedfair.cap through an opgningd in the upper-plate thereof.` The .means for siipply'ing coiiipr'essed air to the. einpart nientslor poekets" ot the vsand holding recep` taele eonsists o f 'suitable vvalveA mechanism connected with the passage 29 and preferably coiiip'rising al slide valie 31 andfa. valve casing 32, mounted oii the stein or standard fr" impressed air supply; The slidee'oiiiieetedfiiiith a. valve rodj'l K iedI "heaiito-iimtieally actuated iiicchaiiisn il Viiotfeoiititutej' 'a portion re `nt ii inea flirt-hei disruption" of: is deemed iinled sand holding;r chamber,-is` .proi'dedat. .its Abottoni' with an outwardly entendi'ng` horizontal ".:ittaeliingr .si-.rows 36 a. hottoi.ii' plat-e3?. adapted to support-'the sand .withiii the poekets or eoniir passages f A partuiei'its of the 4receptacle 1,' and provided with outletsglSI for tli'e disehai'ge off-lle saiuldadeiii eoinpri'r-'ed "iail'. The bottoni plate. 3T is equipped ati its lowenfaee lwith a plnrality. of nozzles' or eoniuxil'ing hli'ieks'tlt),

,5' i vien'ingrs' oi'. passages, y 40, Aextendingy from 'the oiitlelsrltl of t-liehot-toin -pla'te iiiddesigned to eoiuinunieate with the interior ot'eore riiio'lds'fll for charging the, z'

bottoni plate. 3T- is'di-e'taeh'ahle to enable va- -1ioi|:-:. liottoin plates toflie, applied 'to .the

snh-i'liifided-sand holding ,receptacle, so thatI `thefv eqinppedfwitih a hotit'oui plate having nozzle liid "reeeptael" may bereadily..

apaaeeo a. bottoni plate 47, having a plurality 'oi2 per# forations t8`at the 'lower end of each of the `"poeket'slv The compressed 'air cari-ies the sand from the pockets intothe flask 4G and packsjitv around-the'pattern 45. ,The bolts orsc'rivs' SGengage .suitable threaded perfora-tionsinfthebottoin plate 4?, and the latterinlayA lie-.readily attachedto and re-.

moved frointhe lower end of the sand holdingreceptaole.

The support 4 2 Awith the core 'molds and.

tlietlask ivitli .the patterns are .in the operatiOtIilofl th'e a i ppaiat1 i s carried by' a vertif 2 5`Call.y movablecylinder49, co-'acting with a relatlYf-lyfxed. pistn 50 and operated" by. compressed. 'air.=. or-.other .Huid '.pressure, ,which is'intrdduoedf'into the cylinder be- "twoen'the I ipperend 'or head thereoic and the p'istonoftlirougb apipe 51, suitable valve meclian-isni;(not Ysl1oWn ).being employed for controlling ytheglfeed--- and ,exhaust .of such -:.fliii'df, pressurc.-

The upward movementof ,thecylinder 49glifts-the support Li12-and car- 35. riesthe",Corezllnoldsintoontact with the bottom plate? and brings the passages of 'the plngsforbloeks 39into coniinunica- .zftioni Withtlie core moldspand a continued upward iiioven'ient` of the cylinder lifts the' 40 sand holding 'receptacle and carries the ,top thereof into contaotwitli 'the `rubber rings of ,the compressed air cap-,thereby sealing ;the-upper ends oitne pockets or ooinpartmentsiotlie'sub-divided receptacle l. After proper contact-has been made at. the top 'andwbottomv oijhe sandy holding receptacle,l

. the; lido, Yalii 31,',` is -au tomatiea.ll operated -rto introduce 'compressed air into tbe Lpockets or cpmpartments 2i' vThecombined area .of-

56 the enings 'or passages 2l of the plugs 2O .of t e .compressedgair cap is less than the area;y ofthe rsupply or feed Aport of the slide 'a' valve, sothateachfrof the pockets or coinpai'tments offth'el receptacle 1 will receive. va- 5 5 folli-supply ot' compressed v'air,. and one pocket orvcompart-ment will thereby be prei .ventedfrom robbing another and a complete dischargelof sand will" be effected. Also the fluid pressurezywithin die cylinder isgreater 30 than'fthe: faii pressure w'ithin' the sand holding receptacldrsofthat proper contact. be-` tween thevrious parts is maintained w'liiie the sand is being operated on by compressed air. The slide valve 31 is then reversed to exhaust the compressed air Within the sand" so that theempty sand lioldingreceptacle -compartments, each having 'a separate sand compressed air to the same forfsimultaiieousfholdingreoeptaclegaiid the Within the cylindeii49 isalso-exhaustedto pei-initthe cylinder 'to descend to tlieiposi:

fion 'illustrated in Fig. l offthel drawings,

may be shifted 'laterally 'to carry itltolthe sand supplygand to-.simnltaneously bring a Filled4 sand holding receptacle in positiongpgf @Ver the Cylindr- As the construction of/L the cylinder and the operating 4mechanism invention, further description -and illustraf tion thereof are deemed nnifiecessary.,. n. y

Ha ving thus fully described my inventioinl Ywhat. I cla-im as nenY and desire to secure by Letters Patent, is f A l: A sand molding apparatus comprising a sand holding vreceptacle having afp'lu.-

ralit-yof separate sand receiving pocketsforn 85 outlet, and means for supplying compressed air to the 'sand holding receptacle forisii5 nuiltaneous deliveryxtothe said pockets -.or f y compartments.

2. A sand Vmolding appara-tus comprisingi90` assandfliolding receptacle provided"witliaA f plurality of separatesand recciving'poclets; or 'compartments and provided at'the'botf tom 'of each ofthe pockets or compartiirieifitsvv i with a sand outlet,l and means locatedat-"thef 'I5'V e does `not constitute a portion of theprcsonts-- 'i top of the said receptacle for supplyingdelivery to the pockets or comparti I i'ents,A said means inlndingseparate openiiigsor passages foreach of the pocketsorfconi'J-floo partnients.` Y

i 3. A sand molding apparatus comprising" a sand holding receptacle having a "plurality" v i" ot upright sand holding pockets orcni partinents gradua-lljT increasing in area f'oin'n'lob the top Ito the bottom' and provided at the?V latter with sand outlets.| andni'ear'is for' supffg plying` compressed air to'tlie"poo l thet s "pr` o a'sub-diyided sand holding receptacle keying f a' plurality of'scparate sand receiving poeleor compartments tapered', upwardlygafnfdjj gradually-increasing in diameterifiioinjtop im compartments of the said ifecep'taclegf f 4.' A sand. molding apparatusv comprising .n

to bottom, the upper port-ions oft-lie p tickets.' or compartments bein'g circu'lar' rid.the

lower portions being rectangular,' thejwallsj of the uppeixportiongradually mv'rgingl irito'fv the'ivalls of the lower portion',"s`aid receptapockets `witli sand outlets, andmea-ns'looated 4at the-upper ends of the pockets or'; coin,

partnients forsupplying the same with' com- 4 pressed air. -f 5. A -sand molding apparatuscomprising a subdivided sand holdiiig'receptacle having 'a plurality of' sand 'receiving pockets o1 conii partments and provided at the 'lotvcr end thereof with sand outlets, and a Acompressed air cap arranged at thetop tliesaid Jecle being 'provided at the .bottoniogtllieilfg rceptacle and extending over they upper ends 'of all the pockets or compartments and having separate air passages or openings communicating with the upper ends of each of the pockets 'or compartments `tor simultaneons deli-very of compressed air to the same.

6. A sand molding apparatus comprising` a subi-divi ded sand holding receptacle having i a plurality of'sand receiving pockets or--com- .partinents and provided at the lower end thereof with sand outlets, and a compressed air cap having an interior chamber and provided at #the bot-tom thereof with separate passages or openings communicating with each of *the pockets or compartments for simultaneous delivery of compressed air to the same.

7. Asandinoldng apparatus comprisingl u v compartments and provided with openings or passagescommunicating with the same for simultaneous delivery of compressed air to the said pockets or'cornpartments.

l8. A sand molding apparatus comprising a sub-divided sand holding receptacle having a plurality of sandcreeeiving pockets or compartments and provided at the lower end thereof 'with sand outlets, a compressed air' cap arranged. at the top of the said receptaele and extending over the. upper ends of all of the pockets or compartments and having projecting portions registering with the npper ends of-the pockets or compartments and provided with openings orA passages communicating with the same for simultaneous de-1 livery of-rcompressed air thereto, and yieldable means surrounding the projecting portions 4of the compressed air cap and airniiged to form a seal for the upper ends of the pockets' or conu'iartments. A

9. A sand molding apparatus comprising a sub-divided sand holding receptacle having a plurality of sand .receiving pockets or compartments and providedwit the lowcrend thereof with sand outlets, a compressed air cap arranged at the top of the sand receptacle and having projecting,portions register ing with the upper ends of the pockets or compartments and provided with openings or passages communicating with the same for simultaneous delivery of compressed air (hereto, and elastic sealing rings arranged on the projecting portions of the compressed air cap and adapted te he compressed hetween the latter and the receptacle to seal the upper ends of the pockets or compartments.

10. A sand molding apparatus comprising a :nih-dii-'ided sand holding receptacle having ving portions ofthe compressed ait` fap sealing-ri ugs project.

a plurality of sand receiving pockets or compartments and provided atv the lower end thereof with sand outlets, ay compressed aix` compartments and provided `with ,openings p orA passages communicating with the same, elastic scaling rings arranged on the @projectand adapted to he comp'ressed'zbetwcen the latter and the receptacle to seal the upper ends-of the pockets or compartments, and a retainin'g plate secured to the compressed air cap and having openings through. which the il. A s and molding ai paratiis comprising a subdivided sand holdingmecept-acle having a plurality of sand recceivingpoeltets or com' partments and .provided a'. the lower endthereof with ,sand outlets, a. compressed air cap having an interior chamber and provided at the bottom thereof with openings,

plugs secured inftlie said 'openings and project-ing from the bottom of the. compressed air cap and registering with thepoeltets or haring openings or passages to vcommunicate with the saine, uealing rings arranged'onthe' projecting'portions of the :plugs and adapt ed to he pressed hetweeirtle` receptacle and the compressed' aii' cap, and means for' retaining the sealing rings onthc plugs.

12. A sand molding apparatus comprising" a sub-divided sand holding receptacle having aA plurality otV sand receiving pockets or compartments and provided" at the lower end thereof with sand outlets, a coi'nprcssed' air cap having an interior chamber and provided at the bottoni thereof with openings` plugs secured in the said openings and projecting from the bottom of the conn'iressed air cap and registering with the pockets or compartments of the said receptacle and having openings or passages to communicate with thc saine., exteriorly tapered scaling rings arranged on the project-ing por# tions ot theplugs. and a retaining gplate se cured to the bottom of thecoinprssed air cap and having intcriorly beveled penings -itting the sealing rings and through 'which the latter project. ,I

13. A sa nd molding apparatus comprising a sub-divided sand hol ding receptaclel having a plurality ofsand receivingpocketslor coinpaitnients and provided at the bottom thereof with outlets, al compressed lair cap arranged at the 'top of the receptacle and composed of top andbottom pl-.ites sei ured together and forming an interior chamber,- tpe bottom plate being provided with openisgs or'passages confounicating with the pockets or compartments of the said receptacle. .l

14. A sandmoldin'g apparatus comprising cou'ipartments' of thel said `rfmeptacle and lio a sub-divided sand holding receptacle having a plurality of sand" receiving pockets or compartments and provided at the bottom thereof with outlets, a compressed air cap arranged at the top of the receptacle and composed of top and bottom plates secured together and forming an interior chamber, the bottom plate being provided with openings, plugs secured in the openings of the bottom plate and projecting therefrom and having passages to communicate with the said pockets or compartments, and sealing means carried by the projecting portions o't `the plugs and arranged to be compressed between the receptacle Iand thesaid compressed air cap to form an air tight joint or connection.

l5. A sand molding apparatus comprising a sub-divided sand holding receptacle having a plurality of sand receiving pockets ior compartments, means common to all the pockets or compartments and located at the top of the receptacle for simultaneously supplyingthe pockets or compartments with compressed air, and a plate secured to the receptacle at the bottom of t-he pockets or compartments andhaving separate outlets for the same.

16. A sand molding apparatus comprising a sub-divided sand holding receptacle having a plurality of sand' receiving pockets or compartments, means ,located at the top of the receptacle `for supplying the pockets or compartments with compressed air, a plate secured to the receptacle at the v bottom .of the pockets or compartments and having separate outlets for the same, and blocks o-r plugs depending from. thev said plate and having passages communicating with the said outlets and adapted to connect` top of the receptacle for4 supplying the pockets or compartments Withf compressed air, a plate secured to the receptacle at the bottom of the pockets or compartments and having separate'outlets for? the same, and

vblocks or plugs depending vfrom the said plate and provided with passages comnun1- eating withv the'said out-lets, said blocks or plugs having vert-ical side faces adapted to form closures for core molds.

158. A sand molding apparatus com-prising a sub-dividedsand holding receptacle having a plurality of sand `receiving pockets or compartments, means located 'at the top of the receptacle for supplying the pockets or compartments 4with compressed air, a plate secured to the receptacle at 'the bottom of the pockets or compartments and having separate outlets for thesame, andA blocks orplugs 'depending from thesaid plate and forming closures for core molds and provided with passages communicating with the said outlets and having lateral'discharge orifices.

In testimony, 'that I claim the foregoing as-my own, I have hereto airxel my slgnature'in the presence of two Witnesses.

- MADDRA J. HEWLETT.

Witnesses:

W. E. GOULD, JOHN FISHER. 

